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Add a bunch of fprintf(stderr,...) diagnostics to try and help determine 

what is going wrong which is causing this test to crash the kernel.
This commit is contained in:
kre 2019-03-13 08:50:12 +00:00
parent 4038cb5885
commit e5eb671065
1 changed files with 69 additions and 11 deletions
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80
tests/lib/libc/sys/t_mlock.c
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@ -1,4 +1,4 @@
/* $NetBSD: t_mlock.c,v 1.6 2016/08/09 12:02:44 kre Exp $ */
/* $NetBSD: t_mlock.c,v 1.7 2019/03/13 08:50:12 kre Exp $ */
/*-
* Copyright (c) 2012 The NetBSD Foundation, Inc.
@ -29,7 +29,7 @@
* POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__RCSID("$NetBSD: t_mlock.c,v 1.6 2016/08/09 12:02:44 kre Exp $");
__RCSID("$NetBSD: t_mlock.c,v 1.7 2019/03/13 08:50:12 kre Exp $");
#include <sys/mman.h>
#include <sys/resource.h>
@ -41,6 +41,7 @@ __RCSID("$NetBSD: t_mlock.c,v 1.6 2016/08/09 12:02:44 kre Exp $");
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static long page = 0;
@ -55,16 +56,26 @@ ATF_TC_HEAD(mlock_clip, tc)
ATF_TC_BODY(mlock_clip, tc)
{
void *buf;
int err1, err2;
buf = malloc(page);
ATF_REQUIRE(buf != NULL);
fprintf(stderr, "mlock_clip: buf = %p (page=%ld)\n", buf, page);
if (page < 1024)
atf_tc_skip("page size too small");
for (size_t i = page; i >= 1; i = i - 1024) {
(void)mlock(buf, page - i);
(void)munlock(buf, page - i);
err1 = mlock(buf, page - i);
if (err1 != 0)
fprintf(stderr, "mlock_clip: page=%ld i=%zu,"
" mlock(%p, %ld): %s\n", page, i, buf, page - i,
strerror(errno));
err2 = munlock(buf, page - i);
if (err2 != 0)
fprintf(stderr, "mlock_clip: page=%ld i=%zu,"
" munlock(%p, %ld): %s (mlock %s)\n", page, i,
buf, page - i, strerror(errno), err1?"failed":"ok");
}
free(buf);
@ -81,6 +92,7 @@ ATF_TC_BODY(mlock_err, tc)
{
void *invalid_ptr;
void *buf;
int mlock_err, munlock_err;
/*
* Any bad address must return ENOMEM (for lock & unlock)
@ -105,6 +117,7 @@ ATF_TC_BODY(mlock_err, tc)
buf = malloc(page);
ATF_REQUIRE(buf != NULL);
fprintf(stderr, "mlock_err: buf = %p (page=%ld)\n", buf, page);
/*
* unlocking memory that is not locked is an error...
@ -116,8 +129,18 @@ ATF_TC_BODY(mlock_err, tc)
/*
* These are permitted to fail (EINVAL) but do not on NetBSD
*/
ATF_REQUIRE(mlock((void *)(((uintptr_t)buf) + page/3), page/5) == 0);
ATF_REQUIRE(munlock((void *)(((uintptr_t)buf) + page/3), page/5) == 0);
mlock_err = mlock((void *)(((uintptr_t)buf) + page/3), page/5);
if (mlock_err != 0)
fprintf(stderr, "mlock_err: mlock(%p, %ld): %d [%d] %s\n",
(void *)(((uintptr_t)buf) + page/3), page/5, mlock_err,
errno, strerror(errno));
ATF_REQUIRE(mlock_err == 0);
munlock_err= munlock((void *)(((uintptr_t)buf) + page/3), page/5);
if (munlock_err != 0)
fprintf(stderr, "mlock_err: munlock(%p, %ld): %d [%d] %s\n",
(void *)(((uintptr_t)buf) + page/3), page/5, munlock_err,
errno, strerror(errno));
ATF_REQUIRE(munlock_err == 0);
(void)free(buf);
@ -150,6 +173,7 @@ ATF_TC_BODY(mlock_limits, tc)
buf = malloc(page);
ATF_REQUIRE(buf != NULL);
fprintf(stderr, "mlock_limits: buf = %p (page=%ld)\n", buf, page);
pid = fork();
ATF_REQUIRE(pid >= 0);
@ -161,7 +185,7 @@ ATF_TC_BODY(mlock_limits, tc)
res.rlim_cur = i - 1;
res.rlim_max = i - 1;
(void)fprintf(stderr, "trying to lock %zd bytes "
(void)fprintf(stderr, "trying to lock %zu bytes "
"with %zu byte limit\n", i, (size_t)res.rlim_cur);
if (setrlimit(RLIMIT_MEMLOCK, &res) != 0)
@ -169,7 +193,9 @@ ATF_TC_BODY(mlock_limits, tc)
errno = 0;
if (mlock(buf, i) != -1 || errno != EAGAIN) {
if ((sta = mlock(buf, i)) != -1 || errno != EAGAIN) {
fprintf(stderr, "mlock(%p, %zu): %d [%d] %s\n",
buf, i, sta, errno, strerror(errno));
(void)munlock(buf, i);
_exit(EXIT_FAILURE);
}
@ -203,20 +229,39 @@ ATF_TC_BODY(mlock_mmap, tc)
*/
buf = mmap(NULL, page, PROT_READ | PROT_WRITE, flags, -1, 0);
if (buf == MAP_FAILED)
fprintf(stderr,
"mlock_mmap: mmap(NULL, %ld, %#x, %#x, -1, 0): MAP_FAILED"
" [%d] %s\n", page, PROT_READ | PROT_WRITE, flags, errno,
strerror(errno));
ATF_REQUIRE(buf != MAP_FAILED);
fprintf(stderr, "mlock_mmap: buf=%p, page=%ld\n", buf, page);
ATF_REQUIRE(mlock(buf, page) == 0);
ATF_REQUIRE(munlock(buf, page) == 0);
ATF_REQUIRE(munmap(buf, page) == 0);
ATF_REQUIRE(munlock(buf, page) != 0);
fprintf(stderr, "mlock_mmap: first test succeeded\n");
/*
* But it should be impossible to mlock(2) a PROT_NONE mapping.
*/
buf = mmap(NULL, page, PROT_NONE, flags, -1, 0);
if (buf == MAP_FAILED)
fprintf(stderr,
"mlock_mmap: mmap(NULL, %ld, %#x, %#x, -1, 0): MAP_FAILED"
" [%d] %s\n", page, PROT_NONE, flags, errno,
strerror(errno));
ATF_REQUIRE(buf != MAP_FAILED);
ATF_REQUIRE(mlock(buf, page) != 0);
ATF_REQUIRE(munmap(buf, page) == 0);
fprintf(stderr, "mlock_mmap: second test succeeded\n");
}
ATF_TC(mlock_nested);
@ -230,14 +275,26 @@ ATF_TC_BODY(mlock_nested, tc)
{
const size_t maxiter = 100;
void *buf;
int err;
buf = malloc(page);
ATF_REQUIRE(buf != NULL);
fprintf(stderr, "mlock_nested: buf = %p (page=%ld)\n", buf, page);
for (size_t i = 0; i < maxiter; i++)
ATF_REQUIRE(mlock(buf, page) == 0);
for (size_t i = 0; i < maxiter; i++) {
err = mlock(buf, page);
if (err != 0)
fprintf(stderr,
"mlock_nested: i=%zu (of %zu) mlock(%p, %ld): %d [%d] %s\n",
i, maxiter, buf, page, err, errno, strerror(errno));
ATF_REQUIRE(err == 0);
}
ATF_REQUIRE(munlock(buf, page) == 0);
err = munlock(buf, page);
if (err != 0)
fprintf(stderr, "mlock_nested: munlock(%p, %ld): %d [%d] %s\n",
buf, page, err, errno, strerror(errno));
ATF_REQUIRE(err == 0);
free(buf);
}
@ -245,6 +302,7 @@ ATF_TP_ADD_TCS(tp)
{
page = sysconf(_SC_PAGESIZE);
fprintf(stderr, "t_mlock: pagesize %ld\n", page);
ATF_REQUIRE(page >= 0);
ATF_TP_ADD_TC(tp, mlock_clip);